/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.trackedentity;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.List;

import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.hisp.dhis.legend.LegendSet;
import org.hisp.dhis.system.deletion.DeletionHandler;
import org.springframework.stereotype.Component;

/**
 * @author Morten Olav Hansen <mortenoh@gmail.com>
 */
@Component
public class TrackedEntityDataElementDimensionDeletionHandler
    extends DeletionHandler
{
    private final SessionFactory sessionFactory;

    public TrackedEntityDataElementDimensionDeletionHandler( SessionFactory sessionFactory )
    {
        checkNotNull( sessionFactory );
        this.sessionFactory = sessionFactory;
    }

    @Override
    protected void register()
    {
        whenDeleting( LegendSet.class, this::deleteLegendSet );
    }

    @SuppressWarnings( "unchecked" )
    private void deleteLegendSet( LegendSet legendSet )
    {
        // TODO Move this get-method to service layer

        Query query = sessionFactory.getCurrentSession()
            .createQuery( "FROM TrackedEntityDataElementDimension WHERE legendSet=:legendSet" );
        query.setParameter( "legendSet", legendSet );

        List<TrackedEntityDataElementDimension> dataElementDimensions = query.list();

        for ( TrackedEntityDataElementDimension dataElementDimension : dataElementDimensions )
        {
            dataElementDimension.setLegendSet( null );
            sessionFactory.getCurrentSession().update( dataElementDimension );
        }
    }
}
